Train’s 2009 single “Hey, Soul Sister” (produced by Gregg Wattenberg) has been certified diamond by the Recording Industry Association of America as of April 7.
“Hey, Soul Sister” was released August 11, 2009 and was the band’s first single in more than three years and the first single from their fifth album Save Me, San Francisco. The song’s diamond status means it has moved 10 million units. According to the RIAA, one equivalent song unit is equal to a single digital song sale, or 150 on-demand audio and/or video streams.